Which best describes the wavelength of a simple wave?

Physics

1 answer:

Hatshy [7]3 years ago

7 0

Answer:

I think it is A

Explanation: Wavelength is the distance from one crest to another, or from one trough to another, of a wave (which may be an electromagnetic wave, a sound wave, or any other wave). Crest is the highest point of the wave whereas the trough is the lowest.

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A series of ocean waves are moving past a surfer at a frequency of 25 waves per hour. approximately how many waves should the su

Anarel [89]

45 minutes corresponds to $\frac{3}{4}$ of hour. There are 25 waves per hour, so we must find how many waves there are in $\frac{3}{4}$ of hour. Therefore we can write the following proportion:
$25 waves: 1h = x : \frac{3}{4} h$
and by solving ,we find
$x= \frac{25 \cdot \frac{3}{4} }{1 }=18.75 waves$
So, the surfer should expect almost 19 waves in 45 minutes.

5 0

3 years ago

How long have humans been migrating?

weqwewe [10]

Answer:

about 200k years

Explanation:

because we were migrating as cavemans.

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4 years ago

In a basketball game, a ball leaves a player's hand 6.1 m

k0ka [10]

Answer:

The player won't score and will miss the basket for 2.07m short.

Explanation:

We have a 2D proyectile problem, the basketball is moving at the same time in the X and Y axes, we can start by writing the information given:

The distance between the player and the basket is 6.1m that will be X.

The height where the basket was launched is 1.2m that will be the initial position or $Y_{0}$ .

The initial velocity, $V_{o}$ is 7.8 m/s and its launched within 55° with the horizontal, that will be α.

We also need the equations of 2D movemnt

$1. X=X_{0} +V_{x} *t\\2. Y=Y_{0} +V_{0Y} *t+\frac{1}{2}*a_{y} *t^{2}\\3. V_{x}=V_{0}*cos(\alpha)\\4. V_{y}=V_{0}*sin(\alpha)$

We can find the flying time t by using (1)

$t=\frac{X-X_{0} }{V_{0}*cos(\alpha)}$

$t=1.36s$

We can replace t in (2) and find what would be Y with that flying time, if it is equal to 3.05m the height of a basket the player would score, but if not he'll miss.

$Y=0.83m$

As $Y\neq 3.05m$ the player won't score so we need to find how much will the ball miss the basket.

Using Y as 3.05m we can find the flying time necessary to score with equation 2.

we would obtain 2 answers for t, we have to chose the second one, remember that in a parabolic movement you pass 2 times through the same hight when you are going up and when you are going down so after finding the answers $t=0.87s$ .